Drinking cup



FIG. 1 is an elevational view of the drinking cup showing our new design;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a bottom plan view thereof.

The broken line showing of a drinking straw in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a drinking cup, as shown and described. 